Circular saw



FIG. 1 is an isometric view of a circular saw embodying our design as seen from the front and right side;

FIG. 2 is an isometric view thereof as seen from the rear and right side;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof. 

The ornamental design for a circular saw, as shown and described. 